Motion transmitting mechanism



Feb. I7, 1942. w. A. TRAUT MOTION TRANSMITTING- MECHANISM Filed. March 21, 1940 M m a 8 v h U 8 9 PM 1 4 6 Patented Feb. 17, 1942 h 2,273,602 a a MOTION TRANS-Mfume MsormmsM William A T rant; WestAllis, wis.,, assignor to- BIackhaWkMfE. (30., Milwaukee, Wis, a corporation of Wisconsin I a v A plication March 21, IMm'SeriaI No.- 325,115

, 6 Claims.

This invention relates in general to improvemeats in mechanism for transmitting motion from one element to another, for diverse pur poses.

Generally defined, an object of the invention is to provide new and useful motion transmitting. mechanism, especially adapted to convert rotary motion of a swingable element into rotary or recipr'ocatihg motion of another element.

More specifically stated, an object of the pres. ent invention is to provide an improved motion transmitting assemblage for transmitting rotary motion from one gear to another through an inter'veriing reciprocable circular rack, and where in one Of the gears may be swung about the axis of reci rocation of the rack without interfering With the rotary motion transmission.

These and other objects and advantages will be apparent from the following detailed descri' tion.

A clear conception of an embodiment of the invention, and of the modeof constructing and or manipul ting a motion transmitting in ens nism embodying the improvement, may be had by referring to the drawing accompanying and forming a part or this specification wherein like reference characters desig'hate' the same parts inthe several views. 1

Fig; 1 is a top view of one or the im rove mm tion transmitting assemblages; Showing the dir eular rack in central? position and the driving shaft iii section:

Fig.- 2 is a side view or the mechanism pesi' tioned as in Fig. 1, and showing the driven gear in dot-and-dash linesdisplaced in one direction from central position;

Fig. 3 is a top view similar to that of Fig. 1, but showing the circular rack displaced into one extreme position, and also showing the yoke bearings in section; and

Fig. 4 is a side view similar to that of Fig. 2, but showing the driving shaft and gear and the yoke displaced angularly about the axis of the circular rack.

While the improved motion transmitting mechanism has been shown as including a circular toothed rack and toothed gears cooperating therewith, it is not the intent to unnecessarily restrict the scope or usefulness of the invention by virtue of such specific embodiment.

Referring to the drawing, the improved motion transmitting mechanism shown therein comprises in general, a main frame 6 having a shaft 1 fix edly mounted therein and secured thereto by pins 8; a motion transmitting member or circular sit 9 siidabli al'ong'the' n xed shaft 1; a yoke m' swizigabiy suspended from the fiked shaft 1 and having a medial bearing III; a driving shaft 7 I2 jourhaned for rotation in the bearing H and having a driving element .or gear I3 secured thereto and meshing with the annular peripheral teeth M of the rack- 9; and a driven shaft [5 having screw threads t6 coacting' with an interhairy threaded boss I! or the frame 6, and also having a driven element or gear 18 secured thereto and meshing with the rack teeth I 4 remote from the gear is; I

The-gears f3; [8' are of the spur gear type and may be secure to their respective shafts l2, IS in any suitable mann r, as by keys I9. The supporting frame 6 may be of any desired shape and may be part of a larger frame structure, and the ends of'the yoke III which coact with and are pivotall y supported by the shaft 1, should preferably be spaced apart a sufiicient distance so that the rack 9 will be able to travel the desired extent. The teeth {4 of the rack member 9 are parallel to each other, and the available travel of the race 9' Should not be sufficient to cause the driven gear to become disengaged from the rack teeth H as this gear reciprocates'.

During normal use of the improved motion transmitting mechanism, the driving shaft l2 may be rotated in either direction to impart simultaneous rotationto the driving element or gear l3, As the gear I3 is rotated, it coacts with the rack teeth It and causes the rack 9 to slide along the fixed shaft L This motion of the rack 9' along the fixed shaft 1 will obviously cause the gear It to rotate simultaneously with the gear l3 but in an oiiposite direction. The ro-- tation of the gear I8 is transmitted to the driven shaft l5 and as the shaft I5 rotates, the screw threads l6 thereon will cause the shaft 15 and the gear It! to move longitudinally of the axis thereof. By virtue of the provision of the yoke II] which is swingably mounted upon the shaft 1 this yoke l0 together with the driving shaft I2 and gear I3 may be rotated or swung about the central axes of the shaft 1 and of the rack 9, without disturbing the position of the gear l8 by virtue of such swinging movement. The swinging of the yoke l0, however, does not preclude rotation of the shaft l2 and gear l3 during such swinging.

From the foregoing detailed description it will be apparent that my present improvement provides a relatively simple and compact motion transmitting mechanism for transmitting rotary motion from one rotary element to another through an intervening slidable member, and wherein one of the rotary elements may be swung about the axis of the' intervening slidable member.

While it is preferable to have the rotary elements and the member provided with intermeshing teeth, this is not absolutely necessary since these parts may have frictional contact only. The driving shaft I2 may obviously receive its propelling motion from any desired source, and the driven shaft l5 may be connected to any device which it is desired to either rotate or reciprocate. The proven highly satisfactory in actual use, and is adapted for application to various types of structures wherein it is desirable to transfer rotary motion from one gear to another while permitting swinging of one of the gears during such motion transmission. 7

It should be understood that it is not desired" persons skilled in the-art. I

I claim: I g

1. In combination, a frame, a shaft fixedly supported on said frame, a member movable along said shaft and having annular parallel peripheral teeth, a driving gearmeshing with said member teeth and being swingable about the axis of said shaft, and a driven gear meshing with the teeth of said member and having screw thread coaction with said-frame, whereby when said member is moved along said shaft by said driving gear said driving gear is moved along its own axis. v I 1 2. In combination, a frame, an elongated cylindrical guide element fixedly secured to said frame, a member supported by and being freely movable along and revolvable about said element, said member having a series of annular parallel peripheral teeth, a driving gear meshing with said member teeth and being swing.- able about the axisof said element, and a driven gear meshing with said member teeth and having screw thread coaction with said frame, whereby when said memberis moved along said element by said driving gear said driven gear is moved along its'own axis.

l 3. In combination, a frame,-an elongated cylindrical guide element fixedly mounted on said frame, a circular rack supported .by and being freely slidable along and rotatable about said element, and a pair of gearscoacting with the teeth of said circular rack, one of said gears improved mechanism has --said guide shaft near said main frame ends, a

rack member suported by and being freely movable along and revolvable about said shaft .be-

tween said auxiliary frame end portions, said rack member having a series of parallel annular peripheral teeth, driving and driven shafts journalled in said frames and having axes tangent to a common circle circumscribing said guide shaft, and a spur gear carried by each of said driving and driven shafts and coacting with the same teeth of said series, one of said gears being rotatable to impart rotation to the other through said rack member teeth and the gear and shaft carried by said auxiliary frame being swingable therewith about the central axis of said shaft.

5. In combination, a main frame, a guide shaft carried bysaid frame, anv auxiliary U- shaped frame having spaced ends swingably suspended from said shaft, a circular rack supported by and being freely slidable along said guide shaft between said auxiliary frame ends, a driving shaft journalled in and swingable with said auxiliary frame, a driven shaft rotatable in said main frame, said driving and driven shafts having axes tangent to a common circle disposed concentric with said guide shaft, and a spur gear carried by each of said driving and driven shafts and coacting with the same teeth of said rack.

- 6. In combination, a main frame, a guide shaft carried by said frame, an auxiliary frame swingably suspended from said shaft, a circular rack supported by and being freely slidable along said guide shaft laterally adjacent to said auxiliary frame, a driving shaft journalled in and swingable with said auxiliary frame, a driven shaft rotatable in said main frame, said driving and driven shafts having axes tangent to a common circle disposed concentric with said guide shaft, and similar spur gears carried by said driving and driven shafts and coacting with the same teeth of said rack.

WILLIAM A. TRAUT. 

